eventcomm: if we get a read error other than EAGAIN, remove the fd

Otherwise poll() keeps on triggering on our fd until udev gets around to
notifying the server that the device is in some state of deadness. Meanwhile,
the input thread is busy filling the log up with "Read error" messages. Great
way to test file systems and their capacity to handle out of space scenarios
but otherwise a bit pointless. Those FS developers should write their own
tests instead of relying on the synaptics driver!

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Adam Jackson <ajax@redhat.com>

src/eventcomm.c

@@ -557,6 +557,7 @@ SynapticsReadEvent(InputInfoPtr pInfo, struct input_event *ev)
         if (rc != -EAGAIN) {
             LogMessageVerbSigSafe(X_ERROR, 0, "%s: Read error %d\n", pInfo->name,
                     errno);
+            xf86RemoveEnabledDevice(pInfo);
         } else if (proto_data->read_flag == LIBEVDEV_READ_FLAG_SYNC) {
             proto_data->read_flag = LIBEVDEV_READ_FLAG_NORMAL;
             return SynapticsReadEvent(pInfo, ev);